Controlling system



Nov. 5, 1929. v H. E. KRANz 1,734,732

CONTROLLING SYSTEM Filed June 30. 1926 //7 venfar Herman/25 K/anz Patented Nov. 5, 1929 UNITED STATES PATENT orrlcs HERMAN ERIE M2, HAYWOOD; ILLINOIS, ASBIGNOR TO WESTERN ELECTRIC v COMPANY, DTOOBPORLTED, 0! NEW YORK, N. Y., A. CORPORATION: 01' NEW YORK such as high speed coiling commune smart Application and June so, me. mm m. na'm.

This invention relates to'controlling systems, and more particularly to controlling systems for power driven mechanisms. I

Varied forms of manually operable mechanical devices. have been used for controlling the operation of machinery. Thus for example various types of mechanical contrivshoes have insome instances been employed to control the operation of hazardous machinery and render it less dangerous 'to the the operator may be such that it would be im-' possible for him to cause the actuation of a manually operable safety device in order to strip the machinery.

' bjects of this invention areto rovide animproved, simple, eflicient and ependable to" a control system for an o crating mechanism.

In accordance with t ese and other objects the invention contemplates the provision of a combination of electrical circuits. One embodiment of the invention resides in the use of an electron dischar device or vacuum tube having an input an an output circuit.

The'propelling mechanism or machine for which the device is to be employed is pro.-

-vided with a suitable microphone attached or adjacent to the machine. The circuit containing the microphone is electrically connected with the input circuit of the electron discharge device, the out ut circuit of which includes means for afiectln the electrical opcratin circuit for the mac mine. Certain airvibrat ons, such as sound vibrations, are received and am lified by the microphone circuit and there y control the circuit of the driving means.

These and other objects will be apparent from the following description taken in connection with the accompanying drawings, wherein Fig. 1 is a circuit diagram of a controlling device or system disclosingone embodiment of the invention, said device being shown in association with a machine press, and

Fig. 2 is a fragmentary side view disclosing the position of the microphone upon the machine.

- Referring now to the drawings it will be observed that this improved controlling system includes a suitable vibration responsive means such as a microphone conveniently secured in position on the front portion of a press 11. This microphone 10 is contained in a circuit having a source of electrical current such as a battery 12 and including the primary winding of an input transformer 14. The secondary winding of the input transformer 14 is contained in the grid circuit of an electron discharge device such as a vacuum tube 15 and is rovided with a battery 16. The plate circuit of the vacuum tube 15 includes the winding of a relay 18 and a battery. 19, the armature and contact of the re lay 18 being electrically connected in series with a circuit containing the winding of a second relay 20. This latter circuit is connected in parallel with a power circuit and the armature and contact of the relay 20 are electrically connected in series with the power circuit. he power circuit has a source of power supply 21, a suitable switch 22 and an I electric motor 23 for driving the press 11 connected in series.

Vibrations such "as sound waves produced by the voice of an operator will be received by the microphone 10 and a variation in the current will take place in the microphone circuit. This microphone circuit may readily be traced from one side of the battery 12, through the microphone to the primary winding of the input transformer 14, an adjustable resistance 25 and then to the opposite side of the battery 12. Impulses from this circuit are induced in the secondary winding of the transformer 14 which is connected in series with the grid of the vacuum tube 15. The normal current flow in the plate circuit of the tube 15 is not sufiicient to actuate the relay 18, but when the above mentioned impulses are impressed upon the grid circuit a larger current will be caused to flow in the plate circuit and this will cause the actuation of the relay 18. It will be observed that under normal operating conditions the contacts of the relay 18 will be closed and the relay 20 will thus be connected across or in parallel with the power circuit.

By closing the switch 22 the relay 20 will be energized and the armature will close the contact thereof to connect the motor 23 in series with the power circuit to operate the fly wheel of the press 11. This circuit may be traced from one side of the source of power supply 21 through the switch 22, the contact and armature of the relay 20, the motor 23 and then back to the opposite side of the power supply 21. If, during the operation of the motor, an accident should occur or if for some other reason the operator should not be in a position to manually ac tuate the shifter rod 26 for the purpose of stopping the press, the voice of the operator will be suflicient to create the above mentioned increase in the plate current. The plate currentthus increased will cause the operation of the relay 18 to open the l'iridge circuit containing the winding of the relay 20. The relay 2O thereupon de-energizes to open the power circuit containing the motor 23. By this simple system the machine may be stopped quickly without any manual operations.

It is to be understood that the circuits disclosed in this system may also be adjusted torender the system responsive to various degrees of vibration. While the invention has been illustrated in connection with a particular type of machine, it will be understood that the invention is not limited to the precise form shown and described, as other modifications and adaptations thereof may be made without departing from the spirit and scope of the appended claims.

IVhat is claimed is:

1. In a controlling system, an electrical circuit including a propelling mechanism, another circuit including an electron discharge device, and means responsive to a current flow in the circuit of the electron device for aflecting the circuit including the propelling mechanism.

In a controlling system, an electrically operable propelling mechanism, an electrical circuit including an electron discharge device, and means responsive to a current flow in the circuit of an electron device for rendering the propelling mechanism functionally inoperative.

including a propelling mechanism, and means responsive to a current flow in the output circuit for affecting the circuit containing the propelling mechanism.

4. In a safety control system for a propelling mechanism, an electron discharge device including input and output circuits, a vibration responsive means electrically connected with the input circuit, a power circuit including a propelling mechanism, a relay bridged across the power circuit having a contact included serially in the power circuit, and a. relay in the output circuit having a contact in series with the winding of the first mentioned relay.

5. In a controlling system, a mechanism, an electrical circuit, means connected therein responsive to vibrations for affecting the current in the circuit, means for amplifying the change in current, and means actuated by the last mentioned means for operating the mechanism.

6. In a controlling system, an electron-discharge device including input and output circuits, a vibration responsive means connected with the input circuit ofthe electron discharge device, an operated element, and means responsive to a current flow in the output circuit of the electron discharge device for operating the element.

In witness whereof, I hereunto subscribe my name this 16th day of June A. D., 1926.

HERMANN ERNEST KRANZ.

3. In a controlling system, an electron discharge device including input and output circuits, a microphone electrically connected with the input circuit, an electrlcal circuit 

